Question

Determine the range of the function F(x)=x^3-1 when the domain is (0,1,2)

A.(0,1,2) B.(0,1,8) C.(-1,0,7) D.(1,2)

Answer 1

Please help me ):

Answer 2

Plug each of those values (0, 1 , and 2) in for 'x' in your equation....and see what they equal...

f(0) = 0^3 - 1.....= ?
f(1) = 1^3 - 1.....= ?
f(2) = 2^3 - 1.....= ?

Answer 3

so im multiplying 2^3 and 1^3 and 0^3?

Answer 4

You need to solve each equation seperately

so

f(0) = 0^3 - 1
f(0) = 0 - 1
f(0) = -1

And so on etc... like that for the 2 other equations...this will give you the 3 results....I already gave you 1 result...and that is -1

Answer 5

oh okay that was very clear my sister was trying to teach me this but she obviusly didnt no how thanks (:

Answer 6

lol No problem

Answer 7

haha i aprreciate it she got so damn mad that i didnt know how to do the problem when she was doin it wrong the whole time

Answer 8

Haha ehh don't worry about it...she probably just was overthinking it :)

and btw..what do you get when you solve the other 2?

f(1) = 1^3 - 1....so this = what?


And


f(2) = 2^3 - 1 .....and this = what??

Answer 9

i got 0 for the 1^3 is that correct?

Answer 10

That IS correct...

and for the 2^3 one?

Answer 11

okay nicee and i got 7 for that one (:

Answer 12

Awesome!

so

-1 , 0 , 7

Look familiar? :)

Answer 13

hell yeaa that for the help man now im going to embarres the hell out of her because thats what i thought you did in the beginning and she said no! and had the nerve to call me stupid

Answer 14

thanks*

Answer 15

lol no problem man...and yeah...when they tell you the domain is only a set amount of numbers....you realize that 'domain' means "x values" so you would only replace the 'x' in the equation with those values you are given...as we did here...

Answer 16

I mean i am stupid lol but atleast i was doing it right the first time and she swore it was wrong. and so what would i do if the problem gave you X already like this

Determine the domain of the function F(x)=2x-4 when the range is (0,12,20)

and yea i told her that and she said No smh lol

Answer 17

So firstly...lets just write it for the masses lol

Domain = x-values
Range = y-values

So when you are given DOMAIN values...you replace the 'x' in the equation with them..

Well here...you are given the RANGE values...so you would replace F(x) with THOSE...so

F(x) = 2x - 4

and 1 range value is 0...so

0 = 2x - 4

And solve for 'x'

Add 4 to both sides...

2x = 4

And divide both by 2...

x = 2

That would be 1 Domain value...

Answer 18

ohh alright let me try and do one problem and ill tell you what i get (:

Answer 19

Sounds good

Answer 20

alright so i got 8 for the number 12 which i think is correct haha

Answer 21

For the number 12 in the range

F(x) = 2x - 4

Replace F(x) with 12...

12 = 2x - 4

Add 4 to both sides

2x = 16

divide both by 2

x = 8

Very good!

Answer 22

Yes haha i feel good bout myself now lol thanks for the help its greatly appreciated (:

Answer 23

lol no problem man....just to make sure though..what do you get for 20?

Answer 24

i got 12 :D

Answer 25

Awesome...see you are now the master of math in your house xD

Answer 26

lmao yes and i am now a very proud one too! haha

Answer 27

all thanks too you though!

Answer 28

haha no prob man

Answer 29

i am now your fan haha

Answer 30

awesome lol...feel free to ask my in the future if you need any more help...but there are also PLENTY more people this site that are incredible math helpers

Answer 31

haha yeah i know they helped me with alot and thanks ill keep that in mind!